CVE-2024-5693: Mozilla Firefox

Medium severity, CVSS 6.1. EPSS: 0.6% chance of exploitation in the next 30 days.

Offscreen Canvas did not properly track cross-origin tainting, which could be used to access image data from another site in violation of same-origin policy. This vulnerability affects Firefox < 127, Firefox ESR < 115.12, and Thunderbird < 115.12.

Affected products

• Mozilla Firefox: before 115.12 (fixed in 115.12); before 127.0 (fixed in 127.0)
• Mozilla Thunderbird: before 115.12 (fixed in 115.12)

Published 2024-06-11. Last modified 2026-06-17.